mirror of
https://github.com/troglobit/finit.git
synced 2026-10-02 05:52:48 +07:00
Joachim Nilsson
e46e3cdcb6
Ways to log: - Set debug, using kernel cmdline, or edit the sources - Change loglevel severity, default blocks > LOG_NOTICE Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
149 lines
3.0 KiB
C
149 lines
3.0 KiB
C
/* Finit daemon log functions
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*
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* Copyright (c) 2008-2017 Joachim Nilsson <troglobit@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "config.h"
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#include <sched.h> /* sched_yield() */
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#include <stdio.h>
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#include <stdarg.h>
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#include <lite/lite.h>
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#include "finit.h"
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#include "log.h"
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static int up = 0;
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static int debug = 0;
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static int silent = SILENT_MODE; /* Completely silent, including boot */
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static int loglevel = LOG_NOTICE;
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void log_init(int dbg)
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{
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if (dbg)
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debug = 1;
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}
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/* If we enabled terse mode at boot, restore to previous setting at shutdown */
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void log_exit(void)
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{
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silent = SILENT_MODE;
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if (!silent) {
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sched_yield();
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fputs("\n", stderr);
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}
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}
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void log_open(void)
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{
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int opts = LOG_PID;
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closelog();
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if (debug)
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opts |= LOG_CONS | LOG_PERROR;
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openlog("finit", opts, LOG_DAEMON);
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setlogmask(LOG_UPTO(loglevel));
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up = 1;
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}
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void log_silent(void)
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{
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if (debug)
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silent = 0;
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else
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silent = 1;
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}
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int log_is_silent(void)
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{
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return silent;
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}
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/* Toggle debug mode */
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void log_debug(void)
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{
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debug = !debug;
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if (debug) {
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silent = 0;
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loglevel = LOG_DEBUG;
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} else {
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silent = SILENT_MODE;
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loglevel = LOG_NOTICE;
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}
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log_open();
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logit(LOG_NOTICE, "Debug mode %s", debug ? "enabled" : "disabled");
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}
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int log_is_debug(void)
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{
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return debug;
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}
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static void early_logit(int prio, const char *fmt, va_list ap)
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{
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FILE *fp;
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if (!debug && prio > loglevel)
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return;
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fp = fopen("/dev/kmsg", "w");
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if (fp) {
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fprintf(fp, "<%d>finit[1]:", LOG_DAEMON | prio);
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vfprintf(fp, fmt, ap);
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fclose(fp);
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} else {
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vfprintf(stderr, fmt, ap);
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}
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}
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/*
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* Log to /dev/kmsg until syslogd has started, then openlog()
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* and continue logging as a regular daemon.
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*/
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void logit(int prio, const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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if (!up) {
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if (!fexist("/dev/log")) {
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early_logit(prio, fmt, ap);
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goto done;
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}
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log_open();
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}
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vsyslog(prio, fmt, ap);
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done:
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va_end(ap);
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}
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/**
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* Local Variables:
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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